Craig Breslow throws a perfect inning for Pawtucket

For the first time in his five rehab appearances, left-hander Craig Breslow logged a perfect inning on Saturday for Triple-A Pawtucket. Breslow, working his way back from shoulder tendinitis that forced his first career trip to the disabled list, got a first-pitch groundout, a two-pitch pop-up before finishing his outing with a swing-and-miss strikeout. He threw just nine pitches, six for strikes.

In four appearances with Pawtucket, Breslow has allowed one run in 3 2/3 innings while striking out four, walking three and permitting four hits. He also made a rehab appearance with Double-A Portland in which he permitted all four batters whom he faced to reach base.

The Sox suggested that their plan with the 32-year-old was to have him get through this rehab appearance before making an evaluation of his readiness to rejoin the team in the big leagues. Breslow suggested after his May 2 appearance that he hoped to be ready for activation after his Saturday appearance.

Breslow would give the Sox a second left-handed option out of their bullpen, joining Andrew Miller. He had a 2.70 ERA with 61 strikeouts and 22 walks in 63 1/3 innings for the Diamondbacks and Red Sox last year.